Help with plotting multiple locations on a map

can someone help me with plotting multiple locations on a map in my app? Below is the article that I have followed exactly and it does work but for some reason, the addresses will not plot... I do not have lat and long I only have the address. a sample file is attached. I used the below article to complete most tasks thus far:

Re: Help with plotting multiple locations on a map

@bic_services without diving too deeply into it I'd say you need lats/longs. That article says this "... we need to create a String object that has all of the long/lat values from our locations that we can pass into our Bing Map. " so it appears Bing needs a string object of lats/longs to work